Grade 8 Science
Key Concepts
Mix and Flow of Matter
- WHMIS
- Pure substance, mixtures, solutions
- Factors affecting solubility and rate of dissolving
- Particle model of matter
- Viscosity, flow rate and effects of temperature
- Density calculations, mass and volume
- Density of solids, liquids, and gases
- Methods to alter density and buoyancy
- Compressibility of liquids and gases
Cells and Systems
- Characteristics of living things
- Role of cells as a basic unit of life
- Plant vs. animal cells
- Cells, tissues, organs, organ systems
- Diffusion and osmosis
- Body systems:
respiration, circulation, digestion,
excretion and sensory
- Role of major organs in each body system
- Effects of exercise
Light and Optics
- Transparent, translucent, opaque
- Reflection
- Refraction
- Measuring angles of incidence, reflection, refraction, the normal
- Images formed by convex lenses
- Use and contributions of microscopes and telescopes
- Function of eyeglasses
- Eye and camera part comparisons
- Insect eye
Mechanical Systems
- Work
- Mechanical advantage
- Archimedes screw
- Gears and gear trains
- Levers – classes
- Efficiency
- Pressure
- Mechanical advantage
- Closed systems
- Hydraulic systems
- Input and output forces
- Subsystems
- Sources of energy
- Evaluating mechanical devices
General
- Variables
- Lab safety
- Microscope